
/*

  Shape Shifter
  =============
  A canvas experiment by Kenneth Cachia
  http://www.kennethcachia.com

  Updated code
  ------------
  https://github.com/kennethcachia/Shape-Shifter 

*/

'use strict';
window.AvatarGap = window.AvatarGap == undefined ? 5 : window.AvatarGap;
window.AvatarSize = window.AvatarSize == undefined ? 5 : window.AvatarSize;

var S = {
    init: function () {
        var action = window.location.href,
            i = action.indexOf('?a=');

        S.Drawing.init('.canvas');

        // if (i !== -1) {
        //     S.UI.simulate(decodeURI(action).substring(i + 3));
        // } else {
        //     S.UI.simulate('Shape|Shifter|Type|to start|#rectangle|#countdown 3||');
        // }

        S.Drawing.loop(function () {
            S.Shape.render();
        });
    }
};


S.Drawing = (function () {
    var canvas,
        context,
        renderFn,
        requestFrame = window.requestAnimationFrame ||
            window.webkitRequestAnimationFrame ||
            window.mozRequestAnimationFrame ||
            window.oRequestAnimationFrame ||
            window.msRequestAnimationFrame ||
            function (callback) {
                window.setTimeout(callback, 1000 / 60);
            };

    return {
        init: function (el) {
            canvas = document.querySelector(el);
            context = canvas.getContext('2d');
            this.adjustCanvas();

            window.addEventListener('resize', function (e) {
                S.Drawing.adjustCanvas();
            });
        },

        loop: function (fn) {
            renderFn = !renderFn ? fn : renderFn;
            this.clearFrame();
            renderFn();
            requestFrame.call(window, this.loop.bind(this));
        },

        adjustCanvas: function () {
            canvas.width = window.innerWidth;
            canvas.height = window.innerHeight;
        },

        clearFrame: function () {
            context.clearRect(0, 0, canvas.width, canvas.height);
        },

        getArea: function () {
            return { w: canvas.width, h: canvas.height };
        },

        drawCircle: function (p, c, x) {
            var image = new Image();
            image.src = x;
            context.drawImage(image, p.x, p.y, p.z * 3, p.z * 3);
        }
    }
}());


S.UI = (function () {
    var canvas = document.querySelector('.canvas'),
        interval,
        timeout,
        downinterval,
        isTouch = false, //('ontouchstart' in window || navigator.msMaxTouchPoints),
        currentAction = 0,
        resizeTimer,
        time,
        maxShapeSize = 30,
        firstAction = true,
        sequence = [],
        d_time = 10000,
        cmd = '#',
        can = 0;

    function formatTime(date) {
        var h = date.getHours(),
            m = date.getMinutes();
        m = m < 10 ? '0' + m : m;
        return h + ':' + m;
    }

    function getValue(value) {
        return value && value.split(' ')[1];
    }

    function getAction(value) {
        value = value && value.split(' ')[0];
        return value && value[0] === cmd && value.substring(1);
    }

    function timedAction(fn, delay, max, circulation) {
        clearTimeout(timeout);
        if (!max || (currentAction <= max)) {
            if (max && currentAction == max && signwall_show_str.indexOf('#countdown') != -1) {
                currentAction = 1;
            } else if (max && currentAction == max && signwall_show_str.indexOf('#countdown') == -1) {
                currentAction = 0;
            }
            fn(currentAction);
            timeout = setTimeout(function () {
                currentAction = currentAction + 1;
                timedAction(fn, d_time, sequence.length, circulation);
            }, d_time);
        }
    }
    function downAction(fn, delay, maxDown) {		//倒计时  
        clearInterval(downinterval);
        fn(maxDown);
        if (maxDown > 0) {
            downinterval = setInterval(function () {
                clearTimeout(timeout);
                maxDown = maxDown - 1;
                fn(maxDown);
                if (maxDown === 0) {
                    clearInterval(downinterval);
                }
            }, delay);
        }
    }

    function reset(destroy) {
        clearTimeout(timeout);
        clearInterval(downinterval);
        sequence = [];
        time = null;
        if (destroy) {
            S.Shape.switchShape(S.ShapeBuilder.letter(''));
        }
    }

    function performAction(value, circulation) {
        var action;
        var current;
        sequence = typeof (value) === 'object' ? value : sequence.concat(value.split('|'));
        timedAction(function (index) {
            circulation = sequence.length == 1 ? 1 : index + 1;
            current = sequence[circulation - 1];
            action = getAction(current);
            value = getValue(current);
            $('#container').hide();
            $('.canvas').show();
            switch (action) {
                case 'countdown':
                    can = 1;
                    value = parseInt(value, 10) || 10;
                    value = value > 0 ? value : 10;
                    downAction(function (index) {
                        if (index == 0) {
                            if (sequence.length == 0) {
                                S.Shape.switchShape(S.ShapeBuilder.letter(''));
                            } else {
                                currentAction += 1;
                                performAction(sequence, circulation);
                            }
                        } else {
                            S.Shape.switchShape(S.ShapeBuilder.letter(index), true);
                        }
                    }, 4000, value);
                    d_time = 10000;
                    break;

                case 'rectangle':
                    can = 1;
                    value = value && value.split('x');
                    value = (value && value.length === 2) ? value : [maxShapeSize, maxShapeSize / 2];

                    S.Shape.switchShape(S.ShapeBuilder.rectangle(Math.min(maxShapeSize, parseInt(value[0], 10)), Math.min(maxShapeSize, parseInt(value[1], 10))));
                    d_time = 10000
                    break;

                case 'circle':
                    can = 1;
                    value = parseInt(value, 10) || maxShapeSize;
                    value = Math.max(value, maxShapeSize);
                    S.Shape.switchShape(S.ShapeBuilder.circle(value));
                    d_time = 10000
                    break;

                case 'time':
                    can = 1;
                    var t = formatTime(new Date());

                    if (sequence.length > 0) {
                        S.Shape.switchShape(S.ShapeBuilder.letter(t));
                    } else {
                        timedAction(function () {
                            t = formatTime(new Date());
                            if (t !== time) {
                                time = t;
                                S.Shape.switchShape(S.ShapeBuilder.letter(time));
                            }
                        }, 1000);
                    }
                    d_time = 10000
                    break;

                case 'icon':
                    can = 1;
                    S.ShapeBuilder.imageFile(value, function (obj) {
                        S.Shape.switchShape(obj);
                    });
                    d_time = 10000
                    break;

                case 'torus':
                    if (can == 1) {
                        S.Shape.switchShape(S.ShapeBuilder.letter(''));
                        setTimeout(function () {
                            $('.canvas').fadeOut(2000);
                        }, 3000);
                        d_time = 31000;
                        setTimeout(function () {
                            S.Shape.clearCanvas();
                            $('#container').show();
                            style = 'torus';
                            transform(targets.torus, 2000, 'torus', 32);
                        }, 3000);
                    } else {
                        d_time = 29000;
                        $('#container').show();
                        style = 'torus';
                        transform(targets.torus, 2000, 'torus', 32);
                    }
                    can = 0;
                    break;

                case 'sphere':  
                    if (can == 1) {
                        S.Shape.switchShape(S.ShapeBuilder.letter(''));
                        setTimeout(function () {
                            $('.canvas').fadeOut(2000);
                        }, 3000);
                        d_time = 26000;
                        setTimeout(function () {
                            S.Shape.clearCanvas();
                            $('#container').show();
                            style = 'sphere';
                            transform(targets.sphere, 2000, 'sphere', 40);
                        }, 4000);
                    } else {
                        d_time = 26000;
                        $('#container').show();
                        style = 'sphere';
                        transform(targets.sphere, 2000, 'sphere', 40);
                    }
                    can = 0;
                    break;
                case 'grid':
                    if (can == 1) {
                        QD.Sp.ssp(QD.SBCS.letter(''));
                        setTimeout(function () {
                            $('.canvas').fadeOut(2000);
                        }, 3000);
                        d_time = 20000;
                        setTimeout(function () {
                            QD.Sp.cls();
                            $('#container').show();
                            style = 'grid';
                            transform(targets.grid, 2000, 'grid', 27);
                        }, 4000);
                    } else {
                        d_time = 20000;
                        $('#container').show();
                        style = 'grid';
                        transform(targets.grid, 2000, 'grid', 27);
                    }
                    can = 0;
                    break;
                case 'helix':
                    if (can == 1) {
                        S.Shape.switchShape(S.ShapeBuilder.letter(''));
                        setTimeout(function () {
                            $('.canvas').fadeOut(2000);
                        }, 3000);
                        d_time = 24000;
                        setTimeout(function () {
                            S.Shape.clearCanvas();
                            $('#container').show();
                            style = 'helix';
                            transform(targets.helix, 2000, 'helix', 24);
                        }, 4000);
                    } else {
                        d_time = 20000;
                        $('#container').show();
                        style = 'helix';
                        transform(targets.helix, 2000, 'helix', 20);
                    }
                    can = 0;
                    break;

                default:
                    can = 1;
                    S.Shape.switchShape(S.ShapeBuilder.letter(current[0] === cmd ? 'What?' : current));
                    d_time = 10000
            }
        }, d_time, sequence.length, circulation);
    }

    function checkInputWidth(e) {
        if (input.value.length > 18) {
            ui.classList.add('ui--wide');
        } else {
            ui.classList.remove('ui--wide');
        }

        if (firstAction && input.value.length > 0) {
            ui.classList.add('ui--enter');
        } else {
            ui.classList.remove('ui--enter');
        }
    }

    // function bindEvents() {
        // var pauseEle = document.getElementById("pause");
        // pauseEle.addEventListener("click", function (e) {
        //     window.isPause = true;
        //     reset(true);
        //     clearInterval(getPersonInterval);
        //     clearInterval(getArrayInterval);
        //     performAction(window.themeLogo);
        // });
        // document.body.addEventListener('keydown', function (e) {
        //     input.focus();

        //     if (e.keyCode === 13) {
        //         firstAction = false;
        //         reset();
        //         performAction(input.value);
        //     }
        // });

        // input.addEventListener('input', checkInputWidth);
        // input.addEventListener('change', checkInputWidth);
        // input.addEventListener('focus', checkInputWidth);

        // help.addEventListener('click', function (e) {
        //     overlay.classList.toggle('overlay--visible');
        //     overlay.classList.contains('overlay--visible') && reset(true);
        // });

        // commands.addEventListener('click', function (e) {
        //     var el,
        //         info,
        //         demo,
        //         tab,
        //         active,
        //         url;

        //     if (e.target.classList.contains('commands-item')) {
        //         el = e.target;
        //     } else {
        //         el = e.target.parentNode.classList.contains('commands-item') ? e.target.parentNode : e.target.parentNode.parentNode;
        //     }

        //     info = el && el.querySelector('.commands-item-info');
        //     demo = el && info.getAttribute('data-demo');
        //     url = el && info.getAttribute('data-url');

        //     if (info) {
        //         overlay.classList.remove('overlay--visible');

        //         if (demo) {
        //             input.value = demo;

        //             if (isTouch) {
        //                 reset();
        //                 performAction(input.value);
        //             } else {
        //                 input.focus();
        //             }
        //         } else if (url) {
        //             //window.location = url;
        //         }
        //     }
        // });

        // canvas.addEventListener('click', function (e) {
        //     overlay.classList.remove('overlay--visible');
        // });
    // }

    function init() {
        // bindEvents();
        // input.focus();
        isTouch && document.body.classList.add('touch');
    }

    // Init
    init();

    return {
        simulate: function (action) {
            performAction(action);
        }
    }
}());


S.Point = function (args) {
    this.x = args.x;
    this.y = args.y;
    this.z = args.z;
    this.a = args.a;
    this.h = args.h;
};


S.Color = function (r, g, b, a) {
    this.r = r;
    this.g = g;
    this.b = b;
    this.a = a;
};

S.Color.prototype = {
    render: function () {
        return 'rgba(' + this.r + ',' + + this.g + ',' + this.b + ',' + this.a + ')';
    }
};


S.Dot = function (x, y) {
    this.p = new S.Point({
        x: x,
        y: y,
        z: 5,
        a: 1,
        h: 0
    });

    this.e = 0.07;
    this.s = true;

    this.c = new S.Color(255, 255, 255, this.p.a);

    this.t = this.clone();
    this.q = [];
};

S.Dot.prototype = {
    clone: function () {
        return new S.Point({
            x: this.x,
            y: this.y,
            z: this.z,
            a: this.a,
            h: this.h
        });
    },

    _draw: function (x) {
        this.c.a = this.p.a;
        S.Drawing.drawCircle(this.p, this.c, x);
    },

    _moveTowards: function (n) {
        var details = this.distanceTo(n, true),
            dx = details[0],
            dy = details[1],
            d = details[2],
            e = this.e * d;

        if (this.p.h === -1) {
            this.p.x = n.x;
            this.p.y = n.y;
            return true;
        }

        if (d > 1) {
            this.p.x -= ((dx / d) * e);
            this.p.y -= ((dy / d) * e);
        } else {
            if (this.p.h > 0) {
                this.p.h--;
            } else {
                return true;
            }
        }

        return false;
    },

    _update: function () {
        var p,
            d;
        if (this._moveTowards(this.t)) {
            var p = this.q.shift();

            if (p) {
                this.t.x = p.x || this.p.x;
                this.t.y = p.y || this.p.y;
                this.t.z = p.z || this.p.z;
                this.t.a = p.a || this.p.a;
                this.p.h = p.h || 0;
            } else {
                if (this.s) {
                    this.p.x -= Math.sin(1 * 3.142);
                    this.p.y -= Math.sin(1 * 3.142);
                } else {
                    this.move(new S.Point({
                        x: this.p.x + (Math.random() * 50) - 25,
                        y: this.p.y + (Math.random() * 50) - 25,
                    }));
                }
            }
        }

        d = this.p.a - this.t.a;
        this.p.a = Math.max(0.5, this.p.a - (d * 0.05));
        d = this.p.z - this.t.z;
        this.p.z = Math.max(1, this.p.z - (d * 0.05));
    },

    distanceTo: function (n, details) {
        var dx = this.p.x - n.x,
            dy = this.p.y - n.y,
            d = Math.sqrt(dx * dx + dy * dy);

        return details ? [dx, dy, d] : d;
    },

    move: function (p, avoidStatic) {
        if (!avoidStatic || (avoidStatic && this.distanceTo(p) > 1)) {
            this.q.push(p);
        }
    },

    render: function (x) {
        this._update();
        this._draw(x);
    }
}


S.ShapeBuilder = (function () {
    var gap = window.AvatarGap,
        shapeCanvas = document.createElement('canvas'),
        shapeContext = shapeCanvas.getContext('2d'),
        fontSize = 650,
        fontFamily = 'Avenir, Helvetica Neue, Helvetica, Arial, microsoft yahei, sans-serif';

    function fit() {
        shapeCanvas.width = Math.floor(window.innerWidth / gap) * gap;
        shapeCanvas.height = Math.floor(window.innerHeight / gap) * gap;
        shapeContext.fillStyle = 'red';
        shapeContext.textBaseline = 'middle';
        shapeContext.textAlign = 'center';
    }

    function processCanvas() {
        var pixels = shapeContext.getImageData(0, 0, shapeCanvas.width, shapeCanvas.height).data,
            dots = [],
            pixels,
            x = 0,
            y = 0,
            fx = shapeCanvas.width,
            fy = shapeCanvas.height,
            w = 0,
            h = 0;

        for (var p = 0; p < pixels.length; p += (4 * gap)) {
            if (pixels[p + 3] > 0) {
                dots.push(new S.Point({
                    x: x,
                    y: y
                }));

                w = x > w ? x : w;
                h = y > h ? y : h;
                fx = x < fx ? x : fx;
                fy = y < fy ? y : fy;
            }

            x += gap;

            if (x >= shapeCanvas.width) {
                x = 0;
                y += gap;
                p += gap * 4 * shapeCanvas.width;
            }
        }
        return { dots: dots, w: w + fx, h: h + fy };
    }

    function setFontSize(s) {
        shapeContext.font = 'bold ' + s + 'px ' + fontFamily;
    }

    function isNumber(n) {
        return !isNaN(parseFloat(n)) && isFinite(n);
    }

    function init() {
        fit();
        window.addEventListener('resize', fit);
    }

    // Init
    init();

    return {
        imageFile: function (url, callback) {
            var image = new Image(),
                a = S.Drawing.getArea();

            image.onload = function () {
                shapeContext.clearRect(0, 0, shapeCanvas.width, shapeCanvas.height);
                shapeContext.drawImage(this, 0, 0, a.w * 0.8, a.h * 0.8);
                callback(processCanvas());
            };

            image.onerror = function () {
                callback(S.ShapeBuilder.letter('What?'));
            }

            image.src = url;
        },

        circle: function (d) {
            var r = Math.max(0, d) / 2;
            shapeContext.clearRect(0, 0, shapeCanvas.width, shapeCanvas.height);
            shapeContext.beginPath();
            shapeContext.arc(r * gap, r * gap, r * gap, 0, 2 * Math.PI, false);
            shapeContext.fill();
            shapeContext.closePath();

            return processCanvas();
        },

        letter: function (l) {
            var s = 0;

            setFontSize(fontSize);
            s = Math.min(fontSize, shapeCanvas.width / shapeContext.measureText(l).width * 0.9 * fontSize, shapeCanvas.height / fontSize * (isNumber(l) ? 1 : .45) * fontSize);
            setFontSize(s);

            shapeContext.clearRect(0, 0, shapeCanvas.width, shapeCanvas.height);
            if (l.toString().indexOf('/') != -1) {
                shapeContext.fillText(l.substr(0, l.toString().indexOf('/')), shapeCanvas.width / 2, shapeCanvas.height * 0.15);
                shapeContext.fillText(l.substr(l.toString().indexOf('/') + 1), shapeCanvas.width / 2, shapeCanvas.height * 0.6);
            } else {
                shapeContext.fillText(l, shapeCanvas.width / 2, shapeCanvas.height / 2);
            }
            return processCanvas();
        },

        rectangle: function (w, h) {
            var dots = [],
                width = gap * w,
                height = gap * h;

            for (var y = 0; y < height; y += gap) {
                for (var x = 0; x < width; x += gap) {
                    dots.push(new S.Point({
                        x: x,
                        y: y,
                    }));
                }
            }

            return { dots: dots, w: width, h: height };
        }
    };
}());


S.Shape = (function () {
    var dots = [],
        width = 0,
        height = 0,
        cx = 0,
        cy = 0;

    function compensate() {
        var a = S.Drawing.getArea();

        cx = a.w / 2 - width / 2;
        cy = a.h / 2 - height / 2;
    }

    return {
        shuffleIdle: function () {
            var a = S.Drawing.getArea();

            for (var d = 0; d < dots.length; d++) {
                if (!dots[d].s) {
                    dots[d].move({
                        x: Math.random() * a.w,
                        y: Math.random() * a.h
                    });
                }
            }
        },

        clearCanvas: function () {
            dots = [];
        },

        switchShape: function (n, fast) {
            var size,
                a = S.Drawing.getArea(),
                d = 0,
                i = 0;

            width = n.w;
            height = n.h;

            compensate();

            if (n.dots.length > dots.length) {
                size = n.dots.length - dots.length;
                for (var d = 1; d <= size; d++) {
                    dots.push(new S.Dot(a.w / 2, a.h / 2));
                }
            }

            d = 0;
            while (n.dots.length > 0) {
                i = Math.floor(Math.random() * n.dots.length);
                dots[d].e = fast ? 0.65 : (dots[d].s ? 0.54 : 0.51);

                if (dots[d].s) {
                    dots[d].move(new S.Point({
                        z: Math.random() * 20 + 10,
                        a: Math.random(),
                        h: 8
                    }));
                } else {
                    dots[d].move(new S.Point({
                        z: Math.random() * 5 + 5,
                        h: fast ? 4 : 10
                    }));
                }

                dots[d].s = true;
                dots[d].move(new S.Point({
                    x: n.dots[i].x + cx,
                    y: n.dots[i].y + cy,
                    a: 1,
                    z: window.AvatarSize,
                    h: 0
                }));

                n.dots = n.dots.slice(0, i).concat(n.dots.slice(i + 1));
                d++;
            }

            for (var i = d; i < dots.length; i++) {
                if (dots[i].s) {
                    dots[i].move(new S.Point({
                        z: Math.random() * 20 + 10,
                        a: Math.random(),
                        h: 2
                    }));

                    dots[i].s = false;
                    dots[i].e = 0.04;
                    dots[i].move(new S.Point({
                        x: Math.random() * a.w,
                        y: Math.random() * a.h,
                        a: 0.3, //.4
                        z: 1 * 4,
                        h: 0
                    }));
                }
            }
        },

        render: function () {
            // for (var d = 0; d < dots.length; d++) {
            //     dots[d].render();
            // }
            for (var d = 0; d < dots.length; d++) {
                if (return_array.length > 0) {
                    var j = d % return_array.length;
                    dots[d].render(return_array[j].avatar);
                }
                else {
                    if (placeholder_image_arr.length > 0) {
                        var k = d % placeholder_image_arr.length;
                        dots[d].render(placeholder_image_arr[k]);
                    }
                    else {
                        dots[d].render(default_placeholder_image);
                    }
                }
            }
        }
    }
}());


// S.init();
